Effects are "Grayed" out

Can anyone tell me why almost all of the Effects in my Audacity are Grayed Out ? And how to turn them on.

Select some audio to apply an effect to. (see: https://manual.audacityteam.org/man/audacity_selection.html)

Thanks Again !

The effects are greyed out if you are Play or Pause for the sound file. Simply select the stop button and the effects will be activated.